an LM100 is an integrated circuit voltage regulator i came across this circuit in a textbook (electronics for engineers by R. J. Maddock and B.M. Calcutt) it is an outdated circuit but i want to build an equivalent circuit using equivalent components.thank you
Yes it Definately is an Out-dated Voltage Regulator.
The Internal Schematic of this device, as well as typical applications, Appear in the "1968 National Linear Data Book" (Application AN-8).
I have that data book.